Improvement in globe-valves



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Letters Patent No. 94,715, dated September 14, 1869.

-LMv-- IMPROVBMENT IN GLOBE-VALVES.

'lhe Schedule referred to 'in these Letters Patent and making part of the lame.

Know alimen by these presents.-

That I, M. R. COLVIN, of the city and county of Worcester, and Commonwealth of Massachusetts, have invented certain new and useful Improvements' in Globe-Valves; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming va part of this specification, in which- Figure 1 represents a side View of the same;

Figure 2 represents a vertical central section;

Figure 3 represents a top or' plan view of the auxiliary valve-seat; and

Figure 4 represents a side view of the same.

To enable those skilled in the art to which my invention belongs, to make and use the same, I will proceed to'describe it more in detail.

The nature of my invention consists in the construction and arrangement, with the main part of the valve, of an auxiliary metal valve-seat, as hereafter explained.

In the drawings- A is the body of the valve;

B, the cap; and

G, the valve-stem, to the bottom of which is secured the valve D, said parts being constructed as fully indicated in the drawings.

The valve D is secured to the lower end of the valve-stem by means of a cap, a,'in such a manner that thevalve has a yielding connection with the stem.

The lower end, b, of the valve passes down through gnidepieee or stand, e.

E is an auxiliary metal valve-seat, provided with a` screw-thread, 1, to fit the thread 2, cut in the sepa.- rating-part d, which forms thevalve-seat in the ordinary valve. l

f Notches, e, are cut in the upper flanged part, f, of the auxiliary metal valve-seat, by means of which it 'can be turned in and out by a forked wrench made valve-seat, thus obviating the many objections to the use ofthe common globe-valve.

Another practical 'advantage attending my invention is due to the fact that the improvement can 4be applied to old and condemned valves, thereby rendering them as serviceable as new valves.

Having described my improved globe-valve, What I claim therein as new, and of my invention,

and desire to secure b'y Letters Patent, is-

The construction and arrangement, in the bridge or separating-piece cl, of the notched auxiliary metal valve-seat E, substantially as herein described.

M. Bl. OOLVIN;

Witnesses:

ALBERT E. Pnrncn, GEO. H. MILLER. 

